PHP 入门 Demo

<?php include 'conn.php'; // if (!Empty($_POST['submit'])) { if ($_POST) { $sql = "INSERT INTO message(id,user,title,content,lastdate) VALUES (NULL, '$_POST[user]', '$_POST[title]', '$_POST[content]', now())"; mysql_query($sql); // 页面跳转，实现方式为javascript $url = "list.php"; echo "<script language='javascript' type='text/javascript'>"; echo "window.location.href='$url'"; echo "</script>"; // 12 } ?> <script type="text/javascript"> function checkPost(){ if(addForm.user.value==""){ alert("请输入用户名"); addForm.user.focus(); return false; } if(addForm.title.value.length<5){ alert("标题不能少于5个字符"); addForm.title.focus(); return false; } } </script> <FORM align="left" name="addForm" METHOD="POST" ACTION="add.php" onsubmit="return checkPost();"> 用户：<INPUT TYPE="text" NAME="user" /><br /> 标题：<INPUT TYPE="text" NAME="title" /><br /> 内容： <TEXTAREA NAME="content" ROWS="8" COLS="30"></TEXTAREA> <br /> <INPUT align="center" TYPE="submit" name="submit" value="add" /> </FORM>